EP1183501B1 - Seitenwand-Torsionssensor - Google Patents
Seitenwand-Torsionssensor Download PDFInfo
- Publication number
- EP1183501B1 EP1183501B1 EP00929540A EP00929540A EP1183501B1 EP 1183501 B1 EP1183501 B1 EP 1183501B1 EP 00929540 A EP00929540 A EP 00929540A EP 00929540 A EP00929540 A EP 00929540A EP 1183501 B1 EP1183501 B1 EP 1183501B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- swt
- sensor
- sensor according
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012545 processing Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 5
- 230000004308 accommodation Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 description 13
- 230000005291 magnetic effect Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 8
- 230000005294 ferromagnetic effect Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000001953 sensory effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/026—Housings for speed measuring devices, e.g. pulse generator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2240/00—Monitoring, detecting wheel/tire behaviour; counteracting thereof
- B60T2240/03—Tire sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2240/00—Monitoring, detecting wheel/tire behaviour; counteracting thereof
- B60T2240/04—Tire deformation
Definitions
- the present invention relates to a SWT sensor according to the preamble of claim 1.
- the invention generally serves applications in the field of mechanical engineering, especially for braking and driving dynamics systems in the automotive industry, and mainly in Application of regulated systems with brake intervention such as ABS and ASR.
- the main area of application is, however, use for ESP (driving stability control systems) and SWT ("Side Wall Torsion "or sidewall torsion, in the case of sensors the tire sidewall deformation of a motor vehicle wheel measured to determine wheel forces and to determine speed and is evaluated).
- DE-A-40 21 258 describes a system for transmitting a Field sensor to a higher communication system via a Two-wire line known, which for processing physical Signals such as pressure, temperature, flow rate etc. serves.
- the sensed signals are first one Multiplexer and then fed to an A / D converter.
- An in Field sensor constructed in this way is not suitable for Processing signals from a sidewall torsion sensor for tires in which, in addition to the magnetic signals, the Distance information must be evaluated.
- a special tire suitable for SWT or a SWT sensor are known from DE 196 20 582 A1 and DE 196 20 581 A1.
- Machine elements for air gap modulation are known in which in principle all permanent or ferromagnetic parts for Can come into use depending on a measurement physical size in the air gap direction.
- Incremental encoders are usually used for this.
- ferromagnetic and permanent magnetic encoders are, for example, gears, toothed disks, gear rings or Perforated discs. It is a permanent magnetic encoder are usually ring or circular arrangements successive north / south pole areas, embedded in rubber or another mechanical carrier.
- magnetized wheel bearing seals for an ASB system ("Active Sensor Bearing") for wheel speed detection and the magnetized vehicle tire mentioned above for recording dynamic forces according to the SWT principle (Side wall torsion sensors).
- DE 44 42 355 A1 proposes for the detection of dynamic driving states (ESP) of a motor vehicle, for example when cornering, the value an elastic axis deformation and as their Measure the thickness of the air gap between a speed sensor and to use the encoder assigned to it.
- ESP dynamic driving states
- the object of the present invention is to provide one for everyone Concept of sensors equally suitable to be provided, in which modular sensor assemblies are formed, whose basic system is suitable for all sensors. It is also the object of the present invention, one for this concept of joint assembly formation suitable Sensor, in particular a SWT sensor to create.
- a first inventive idea is future SWT sensors constructive generally so that they in Housing dimensions and external shape with those already used Sensor elements for the production of active ABS wheel speed sensors (assembled with cable and plug) are identical or almost identical.
- This has the advantage that the same series tools for series production can be used as for active wheel speed sensors. Because of the wide variety of different Series programs for active sensors exist in abundance already existing different shapes and constructive Forms of training for active wheel speed sensors with the associated series tools, from which for the SWT sensors suitable shapes can always be adopted. The Development effort is minimized and it is created the advantage that even small SWT equipment rates are economical can be operated. This basic idea applies also for future active sensors for wheel speed detection.
- an inventive one Arrangement described with the air gap modulations any kind can be grasped, so that along with them the wheel speed also changes the air gap as a function can be measured by deformation forces.
- These sensors are particularly useful for realizing the side wall torsion concept particularly suitable, but also for Implementation of sensory systems for ESP based on the DE 44 42 355 A1.
- FIGS. 1 a-d a general is first Concept for the standardized design of assembly groups. described for the active-sensory scanning of encoders, the processed sensors (sensors) are or, according to the invention, common modular assemblies exhibit.
- Fig. 1a shows a construction concept corresponding to the invention outer housing shape or basic structure of a general Sensor element.
- the reference number 1 a housing or head consisting in particular of plastic 1, in which there is always some magneto-electric Converter element is embedded.
- With 2 is a particular Designated plastic case that continues body 2 is also called.
- the planned application determines what kind of Converter element the head 1 and what a signal processing circuit the body contains 2.
- Between head 1 and Body 2 is always a four-pole electrical connection 3.
- a pin 4 serves as a signal output and a pin 5 for supply with operating voltage.
- Figures 1b, 1c and 1d show the general shape of the housing 1a combined with three different sizes Magnets 6, 7 and 8. These magnets 6, 7 and 8 serve for different magnetic bias as required magneto-electrical transducer elements in the head 1.
- the invention Following the concept of the construction, there are three different magnets 6, 7, 8 are defined in their size, so that there are now general construction variants whose Contents the head 1 or body 2 according to the application can be exchanged or adapted.
- Another advantage of the construction concept according to the invention consists of the following four interface properties to realize.
- a 2-wire connection to the control unit Operation with a wide range of unregulated supply voltage, Impressed current as a carrier of the output signal as well as continuous frequency resolution until standstill of the encoder.
- magneto-electrical Used converters that are based on XMR technologies (see publisher VDI-Technologietechnik, Düsseldorf, “Technology Analysis Magnetism", Volume 2).
- AMR technology anisotropic magnetoresistance
- GMR technology giant magnetoresistance
- the construction variants are always particularly advantageous follows used. 1a in combination with permanent magnetic encoders, the construction variant according to Fig. 1b in combination with ferromagnetic encoders, the construction variant 1c in combination with ferromagnetic Encoders and the variant according to Fig. 1d in combination with permanent magnetic encoders.
- the invention is also suitable for active wheel speed sensors with transmission of additional information and a Novel data protocol according to DE 196 34 715 A1.
- Conceivable is also a head 1 with magnetoresistive bridge and barber pole structure, where an IC or ASIC for direction detection and air gap diagnosis can be used.
- Sensor module is an active sensor for simultaneous Detection of wheel speed and dynamic air gap deformation.
- a sensor can be particularly advantageous for ESP or SWT can be used. Since includes the sensor preferably a head 1 with a magnetoresistive bridge and a body 2 with an ASIC, in particular of the type UA1272. This sensor is preferred according to one of the design variants 1 b-d.
- Fig. 2b show a schematic representation of an electronic circuit with Function blocks of an active wheel speed sensor
- Fig. 2a shows a schematic circuit of the sensor according to the invention. Both representations also show the constructive Assignment of the function blocks to the superordinate construction concept according to Fig. 1.
- the same crystal building block can be used as it already is as a standard component of in large numbers manufactured sensor elements for active ABS wheel speed sensors is available. That brings the economic Advantage of the mass quantities for active wheel speed sensors to participate and there is the advantage that even small SWT equipment rates are served more economically can be. At the same time, the produced increases Total number of crystal blocks that become cheaper.
- Both heads 1 contain a magnetoresistive bridge circuit 9 of the same type.
- the magneto-electrical transducers 9 are magnetic via an air gap, not shown here coupled to a permanent magnetic encoder track 10, that especially in the sidewall of a magnetized tire or arranged in a magnetized wheel bearing seal is.
- the heads 1 are above the four-pole Connections 3 connected to the bodies 2.
- For each Control unit 11 is the above-mentioned 2-wire connection via pin 4 and pin 5.
- the voltage supply V CC is provided via pin 5 from an electrical control unit for the brake system.
- the signal processing circuits contained in the bodies 2 differ by the schematically represented assemblies 12 and 13, so that the signal currents J 1 and J 2 also differ significantly.
- any amplitude fluctuations caused by dynamic air gap deformations are suppressed by an amplifier or trigger stage 13 and the signal is shaped into an exactly impressed square-wave signal current J 2 with two constant amplitudes, so that the information transmitted is based on the wheel speed 14 is limited, which is reflected in the edge sequence.
- an electronic circuit 12 which amplifies and processes the signal analogously, so that a signal current J 1 is fed to the control unit 11, from which, in addition to the wheel speed information 14, the amplitude height as a measure of the air gap thickness 15 and the phase reference 16 can be taken from a reference signal.
- 3a and 3b illustrate once again the differences in the signal currents J 2 and J 1 between the known active sensor from FIG. 2b and the sensor according to the invention according to FIG. 2a under the same interface conditions to the encoder. Assuming an air gap change shown here, both sensors map the same wheel speed, but only the sensor according to the invention also the amplitude that varies with the air gap thickness.
- a SWT sensor can be implemented as described above Arrangement designed for the following parameters, for example his:
- the magnetized tire sidewall as an encoder track can, for example with a pole pattern of 48 north / south pole pairs per 360 ° side wall and a magnetic field strength amplitude at 10 mm air gap of 0.8 kA / m.
- SWT sensor Realization of a SWT sensor is the sensory arrangement using the construction concept according to the invention following assemblies realized.
- the head 1 has one magnetoresistive bridge 9, the body 2 comprises an ASIC type UA1272.
- the sensor is preferably in accordance with the 1b, 1c or 1d.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Regulating Braking Force (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19922672 | 1999-05-18 | ||
DE19922672 | 1999-05-18 | ||
PCT/EP2000/004498 WO2000070309A1 (de) | 1999-05-18 | 2000-05-18 | Sensorbaugruppe und sensor für eine derartige baugruppe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1183501A1 EP1183501A1 (de) | 2002-03-06 |
EP1183501B1 true EP1183501B1 (de) | 2003-10-15 |
Family
ID=7908335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00929540A Expired - Lifetime EP1183501B1 (de) | 1999-05-18 | 2000-05-18 | Seitenwand-Torsionssensor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1183501B1 (ja) |
JP (1) | JP4545954B2 (ja) |
DE (1) | DE50004083D1 (ja) |
WO (1) | WO2000070309A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004034865A1 (de) | 2004-07-19 | 2006-02-16 | Siemens Ag | Sensor zur Messung der Position eines Stellgliedes |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4939455A (en) * | 1988-09-02 | 1990-07-03 | Hamilton Standard Controls, Inc. | Sensor having two-wire connection to load |
JPH0650557B2 (ja) * | 1989-07-04 | 1994-06-29 | 株式会社日立製作所 | フィールド計器の通信方式 |
DE4435160A1 (de) * | 1994-09-30 | 1996-04-04 | Continental Ag | Einrichtung zur Ermittlung der Umfangskraft eines Fahrzeugrades |
DE4434977B4 (de) * | 1994-09-30 | 2005-02-17 | Continental Teves Ag & Co. Ohg | Aktiver Bewegungssensor |
DE19548759A1 (de) * | 1995-12-23 | 1997-06-26 | Continental Ag | Einrichtung und Verfahren zum Messen und zum Ermitteln von Radlast, Beschleunigungskraft und von der Geschwindigkeit eines Fahrzeugs |
DE19634715A1 (de) * | 1996-08-28 | 1998-03-05 | Teves Gmbh Alfred | Anordnung zur Erfassung des Drehverhaltens eines Rades |
JPH10332722A (ja) * | 1997-06-02 | 1998-12-18 | Matsushita Electric Ind Co Ltd | 回転速度検出装置 |
-
2000
- 2000-05-18 EP EP00929540A patent/EP1183501B1/de not_active Expired - Lifetime
- 2000-05-18 WO PCT/EP2000/004498 patent/WO2000070309A1/de active IP Right Grant
- 2000-05-18 DE DE50004083T patent/DE50004083D1/de not_active Expired - Lifetime
- 2000-05-18 JP JP2000618694A patent/JP4545954B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE50004083D1 (de) | 2003-11-20 |
JP2002544511A (ja) | 2002-12-24 |
WO2000070309A1 (de) | 2000-11-23 |
JP4545954B2 (ja) | 2010-09-15 |
EP1183501A1 (de) | 2002-03-06 |
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